Teleporting at x from -0.25 to 0.25 using local coordinates is not accurate

Steps to reproduce:

• Stand anywhere with x coordinate from -0.25 to 0.25 and 0 y rotation

  /tp @s 0 ~ ~ 0 0

• Teleport forward with local coordinates

  /tp ^ ^ ^1

 

When i used /data get entity @s Pos my x coordinate is 0.5d but after /tp ^ ^ ^1 it became 0.5000000000000001d